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Preparation of monolayer-assembled fluorescent film and its sensing performances to hidden nitroaromatic explosives

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Chinese Science Bulletin 2008年第11期53卷 1644-1650页

作者： LI HuiHui LU fengting ZHANG ShuJuan he Gang FANG Yu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education School of Chemistry and Materials ScienceShaanxi Normal University Xi'an 710062 China

Pyrene was chemically assembled on a glass plate surface in a monolayer manner via spacers con-taining triethylenetetramine (TETA) subunits. It has been demonstrated that the fluorescence emission of the film is sensitive to the presence of trace amount of nitroaromatic compound (NAC) vapors. As discovered in the present work, the response selectivity of the pyrene-functionalized film depends on the length of the spacer, the vapor pressure of a given NAC, and the quencher size. The film shows faster response to those quenchers which have higher vapor pressure and smaller size. Compared to the film with shorter spacers, the present film with longer flexible spacers shows a slower response to the NACs, but higher selectivity to the quencher size. Additionally, the detection limits to common ex-plosives in vapor phase, 2,4,6-trinitrotoluene (TNT) and 2,4-dinitrotoluene (DNT), are 7.14×10-12 and 5.49×10-11 g·mL-1, respectively. Further examinations indicated that the sensing process is fully re-versible, and the vapors of those common interference such as benzene, toluene, ethanol, and perfume have little effect upon the sensing performances of the film.

关键词：荧光薄膜传感性能单层自组装薄膜硝基芳香物族化合物炸药

Acidification and bubble template derived porous g-C_(3)N_(4) for efficient photodegradation and hydrogen evolution

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Chinese Chemical Letters 2020年第10期31卷 2668-2672页

作者： Yixuan Wang fengting he Lin Chen Jie Shang Jiajia Wang Shuaijun Wang Huimin Song Jinqiang Zhang Chaocheng Zhao Shaobin Wang Hongqi Sun State Key Laboratory of Petroleum Pollution Control China University of Petroleum(East China)Qingdao 266580China School of Engineering Edith Cowan University270 Joondalup DrivePerth WA 6027Australia China General Nuclear Power Hongda Environmental Science and Technology Co. Ltd.Jinan 250000China Dongying Municipal Bureau of Marine Development and Fisheries Dongying Municipal Marine and Fishery Environmental Monitoring CenterDongying 257091China School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaide SA 5005Australia

Graphitic carbon nitride(g-C_(3)N_(4))as a metal-free candidate of photocatalyst has received worldwide attention because of its great potentials in solar light-induced degradation and hydrogen evolution,yet the industrial application is seriously hindered by the small specific surface area and rapid recombination rate of ***,we demonstrate that porous g-C_(3)N_(4)(HCl-CNU-X)can be prepared via the copolymerization of acidified melamine and a green bubble template(urea).Transmission electron microscopy and nitrogen sorption characterization results show that the prepared HCl-CNU-X possesses an in-plane porous structure and large specific surface area,enabling the exposure of more accessible active *** a result,HCl-CNU-X exhibits both enhanced photocatalytic tetracycline hydrochloride degradation and higher hydrogen evolution than bulk g-C_(3)N_(4).The boosted photocatalytic performance was ascribed to the formation of the porous structure,which dramatically promotes the separation of charge-carriers and facilitates the electron *** work demonstrates that the acidification of nitrogen-rich precursors combined with a bubble-template can develop a new paradigm of highly porous photocatalysts for environmental remediation and water splitting.

关键词： g-C_(3)N_(4) Porous structure Tetracycline hydrochloride Hydrogen evolution Acidification and bubble template Visible light

In situ generation of oxyanions-decorated cobalt(nickel)oxyhydroxide catalyst with high corrosion resistance for stable and efficient seawater oxidation

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Journal of Energy Chemistry 2024年第7期94卷 508-516页

作者： fengting Luo Pei Yu Jueting Xiang Junjie Jiang Shijian Chen Chongqing Key Laboratory of Interface Physics in Energy Conversion College of PhysicsChongqing UniversityChongqing 401331China Center of Modern Physics Institute for Smart City of Chongqing University in LiyangLiyang 213300JiangsuChina

The development of efficient and robust anode materials for stable alkaline seawater electrolysis is severely limited by chlorine evolution reaction and chloride ***,the sulfur-doped cobalt-nickel bimetallic phosphides(CoNiPS)are specifically designed as a pre-catalyst for navigating a surface reconstruction to fabricate the anions(PO^(3-)_(4) and SO^(2-)_(4))-decorated Co(Ni)OOH catalyst(R-CoNiPS)with exceptional durability and high activity for stable alkaline seawater oxidation(ASO).Various experiment techniques together with theoretical simulations both demonstrate that the in situ-generated PO^(3-)_(4) and SO^(2-)_(4) anions on catalyst surface can improve the oxygen evolution reaction(OER)activity,regulating and stabilizing the catalytic active species Co(Ni)OOH,as well as make a critical role in inhibiting the adsorp-tion of chloride ions and extending the service life of ***,this R-CoNiPS electrode exhi-bits superb OER activity toward AsO and stands out among the non-precious ASO electrocatalysts reported recently,requiring low overpotentials of 420 and 440 mV to attain large current densities of 500 and 1000 mA cm^(-2) in an alkaline natural seawater electrolyte,***,the catalyst displays a negligible chloride corrosion at room temperature during ASO operation(>200 h)at 500 mA cm^(-2).This work opens up a new viewpoint for designing high-activity and durable electrocata-lystsforseawaterelectrolysis.

关键词： Seawater electrolysis Anions Oxygen evolution reaction Chloride corrosion

Denitration of Nitroarenes Under Ambient Physiological Conditions Catalyzed by Graphdiyne-Supported Palladium

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CCS Chemistry 2024年第3期6卷 641-651页

作者： Endong Zhang Yanyan Chen fengting Lv Zicheng Zuo Feng he Yongjun Li Yiming Huang Yuliang Li Shu Wang Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190 College of Chemistry University of Chinese Academy of SciencesBeijing 100049

The direct cleavage of C–NO_(2)bonds for reductive denitration of nitroarenes remains a challenging transformation in synthetic organic ***,we report a biocompatible palladium-deposited graphdiyne nanocatalyst(Pd@GDY/DSPE-PEG)that can catalyze reductive denitration of nitroarenes under ambient physiological *** studies support this transformation via the oxidative addition of nitroarenes with Pd(0)and subsequent ligand exchange to form arylpalladium *** one-step reductive denitration via Pd@GDY/DSPE-PEG successfully facilitates the repair of the nitrated proteins arising from endogenic ONOO−and restores their physiological function,including blocking the apoptosis pathway in living ***,Pd@GDY/DSPE-PEG was further successfully applied for catalytic denitration to reduce the level of 3-nitrotyrosine residues of proteins located in the mouse brain hippocampus in *** study provides an ideal strategy for designing highly active enzymatic mimicking synthetic catalysts for the regulation of the nitrated protein level and the detoxification of nitrative damage of living cells and tissues.

关键词： 3-nitrotyrosine artificial nanaocatalysts reductive denitration palladium-deposited graphdiyne repairing nitrated protein

A Novel Recovery Strategy to Suppress Subsequent Commutation Failure in an LCC-Based HVDC

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Protection and Control of Modern Power Systems 2024年第1期9卷 38-51页

作者： Changsheng Su Chunya Yin fengting Li Lu Han 不详 School of Electrical Engineering Xinjiang UniversityUrumqi 830017China

A subsequent commutation failure(SCF)can easily occur during the recovery process after a first commutation failure(1st CF).This paper analyzes the interaction mechanism of extinction angle,AC voltage,DC current and firing angle,and reveals that the complex coupling relationship during the dynamic process after the 1st CF has a significant effect on the *** mathematical equations when considering different fault durations,fault severities and AC system strengths are then *** AC fault voltage detection method based on reactive power and fault duration is also proposed to measure the fault severity,and an SCF inhibition control strategy(SCFICS)based on AC fault detection and reactive power control is subsequently *** can not only inhibit the SCF,but also enhance the DC recovery speed ***,based on the SCFICS,a simulation model is built,and the simulation results with different cases indicate that the SCFICS can effectively inhibit the SCF with good recovery performance,for three-phase-to-ground(TPG)and single-phase-to-ground faults,and with a fault inductance range of 0.01 H to 1 H.

关键词： fault extinction angle

Transcriptomic and metabolomic analysis provides insights into lignin biosynthesis and accumulation and differences in lodging resistance in hybrid wheat

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Journal of Integrative Agriculture 2024年第4期23卷 1105-1117页

作者： Weibing Yang Shengquan Zhang Qiling Hou Jiangang Gao Hanxia Wang Xianchao Chen Xiangzheng Liao fengting Zhang Changping Zhao Zhilie Qin Institute of Hybrid Wheat Beijing Academy of Agriculture and Forestry SciencesBeijing 100097China Beijing Municipal Key Laboratory of Molecular Genetics of Hybrid Wheat Beijing 100097China

The use of hybrid wheat is one way to improve the yield in the ***,greater plant heights increase lodging risk to some *** this study,two hybrid combinations with differences in lodging resistance were used to analyze the stem-related traits during the filling stage,and to investigate the mechanism of the difference in lodging resistance by analyzing lignin synthesis of the basal second internode(BSI).The stem-related traits such as the breaking strength,stem pole substantial degree(SPSD),and rind penetration strength(RPS),as well as the lignin content of the lodging-resistant combination(LRC),were significantly higher than those of the lodgingsensitive combination(LSC).The phenylpropanoid biosynthesis pathway was significantly and simultaneously enriched according to the transcriptomics and metabolomics analysis at the later filling stage.A total of 35 critical regulatory genes involved in the phenylpropanoid pathway were ***,42%of the identified genes were significantly and differentially expressed at the later grain-filling stage between the two combinations,among which more than 80%were strongly up-regulated at that stage in the LRC compared with *** the contrary,the LRC displayed lower contents of lignin intermediate metabolites than the *** results suggested that the key to the lodging resistance formation of LRC is largely the higher lignin synthesis at the later grain-filling ***,breeding strategies for synergistically improving plant height and lodging resistance of hybrid wheat were put forward by comparing the LRC with the conventional wheat applied in large areas.

关键词： gene expression lignin synthesis lodging-resistance hybrid wheat

The origin of two divergent ovine β-globin haplotypes and their potential association with environmental adaptation

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Journal of Genetics and Genomics 2024年第8期51卷 877-879页

作者： Yuxin Kang Yilin Liang fengting Fan Hojjat Asadollahpour Nanaei Chunna Cao Yu Jiang Xianyong Lan Chuanying Pan Ran Li College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxi 712100China Key Laboratory of Livestock Biology Northwest A&F UniversityYanglingShaanxi 712100China Department of Animal Science Fars Agricultural and Natural Resources Research and Education CenterAgricultural ResearchEducation&Extension Organization(AREEO)FarsIran Author links open overlay panel

hemoglobin is responsible for transporting oxygen from the lungs to body ***,this protein is a tetramer composed of two a-globin chains and twoβ-globin *** sheep,the β-globin locus is of particular interest because it contains two different haplotypes,namely haplotype A(hap A)and hap B,which differ in length by more than 30 kb and do not undergo recombination with each other due to low sequence similarity(Bauer and Jung,1975;Jiang et al.,2015).The two haplotypes also differ in gene content with hap A possessing two clusters of hemoglobin gene families and hap B possessing only one(Aguiletam et al.,2004),which implies differentiation in their functional *** A was speculated to be associated with high-altitude adaptation in sheep(Hu et al.,2019).

关键词： chains altitude similarity

增强π共轭结构的电子密度和面内电荷输运促进g-C_(3)N_(4)的光催化析氢

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Science China Materials 2023年第6期66卷 2274-2282页

作者：张洋曹宁刘晓明贺凤婷郑彬赵朝成王永强 State Key Laboratory of Petroleum Pollution Control China University of Petroleum(East China)Qingdao 266580China

石墨相氮化碳(g-C_(3)N_(4))已成为一种新兴的无金属光催化剂并引起了研究人员的关注.然而,通过传统热缩聚得到的纯g-C_(3)N_(4)(PCN)的庚烷环链聚合度低,含有大量的电荷重组中心,阻碍了平面内的电荷传输,导致光催化性能不理想.本文采... 详细信息

石墨相氮化碳(g-C_(3)N_(4))已成为一种新兴的无金属光催化剂并引起了研究人员的关注.然而,通过传统热缩聚得到的纯g-C_(3)N_(4)(PCN)的庚烷环链聚合度低,含有大量的电荷重组中心,阻碍了平面内的电荷传输,导致光催化性能不理想.本文采用一水合草酸铵热处理PCN制备了高分散的多孔g-C_(3)N_(4)纳米片(CN-A),并在不引入杂原子的情况下,成功地提高了其平面内庚烷环链的完整度.电子顺磁共振和^(13)C核磁共振分析表明,π共轭结构的电子密度和离域效应显著提高.所制备的样品表现出优异的稳定性和光催化活性,在无助催化剂Pt和有助催化剂Pt下的氢气还原速率分别是PCN的11.2倍和5.3倍.

关键词：电子顺磁共振电子密度石墨相氮化碳离域效应完整度电荷输运电荷传输氢气还原

原位沉积法制备g-C3N4/Ag3PO4复合光催化剂降解卡马西平的性能研究

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材料导报 2020年第19期34卷 19010-19017页

作者：乔帅赵朝成贺凤婷赵洪飞董培林飞飞台兆鑫中国石油大学(华东)化学工程学院青岛266580 石油石化污染物控制与处理国家重点实验室北京102206

通过原位沉积法制备g-C 3N 4/Ag 3PO 4复合光催化剂,采用红外光谱(FT-IR)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外可见漫反射(UV-Vis)、光电子能谱(XPS)、光致发光光谱(PL)以及比表面积分析(BET)等表征手法对所制备的催... 详细信息

通过原位沉积法制备g-C 3N 4/Ag 3PO 4复合光催化剂,采用红外光谱(FT-IR)、X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、紫外可见漫反射(UV-Vis)、光电子能谱(XPS)、光致发光光谱(PL)以及比表面积分析(BET)等表征手法对所制备的催化剂进行表征,并对其可能的形成机制进行探究。同时以10 mg/L的卡马西平(CBZ)模拟废水为目标污染物测试光催化剂的光催化性能,相比于g-C 3N 4单体和Ag 3PO 4单体,g-C 3N 4/Ag 3PO 4复合光催化剂表现出更强的光催化能力,其中以g-C 3N 4与Ag 3PO 4理论质量比为1∶0.5的复合光催化剂CN/AP-0.5效果最佳,在可见光光照80 min后,卡马西平(CBZ 10 mg/L)降解率可达到80%,催化性能较g-C 3N 4单体与Ag 3PO 4单体均有很大的提高。自由基捕获实验证明,在光催化降解CBZ过程中空穴(h+)为主要活性物种。

关键词：原位沉积法 g-C3N4/Ag3PO4 卡马西平(CBZ) 光催化